Income Taxes - Net Operating Loss Carry-forward (Details) $ in Millions |
Dec. 31, 2016
USD ($)
|
|---|---|
| Operating loss carry-forward | |
| Valuation allowance | $ 3.2 |
| Federal | |
| Operating loss carry-forward | |
| Net operating loss carry-forward | 19.5 |
| State | |
| Operating loss carry-forward | |
| Net operating loss carry-forward | $ 48.2 |